Computing attachment for type-writers.



EST AVAILABLE C A. P. SMITH.

COMPUTING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED MAY 6, 1913,

1,099,725. Patented June 9,1914,

4 SHEETS-SHEET l.

WITNESSES T VAILABLE cop APPLICATION FILED MAY 6, 1913.

I Patented June 9, 1914.

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COMPUTING ATTACHMENT FOR TYPE WRITERS.

APPLICATION, TILED MAYG, 1913.

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A. P, SMITH.

COMPUTING ATTACHMENT FOR TYPE WRITERS.

APPLICATION FILED MAY 6, 1913.

1,099,725. Patented June 9,1914. I

4 SHEETSSHEET 4.

7 ZMMQQ ALFRED F. SMITH, 0F INGOMAR, PEN'NSYLVANIA.

COMPUTING ATTACHMENT FOR TYPEWRITERS.

Specification of Letters Patent.

Patented June 9, 1914.

. Application file d May 6, 1913. Serial No. 765,794.

keys, etc., and is designed to provide a mechanism of this character ofsimple, accurate and efficient construction which will automatically andsuccessively compute the several amounts printed, giving final-results,

either in addition or subtraction, successively for each operation andfor the final result by a visible indicator.

My invention embodies nrprovements, in

-a calculating or computing machine, particularly adapted to embodimentin a type writer. in providing a right hand and left hand totalerj novelmeans for actuating a series or bank of indicating wheels through aninternal'shifting master pinion, means mechanism in elevation.

for transmitting rotating movement to the master wheel through a slottedsleeve, rack and pinion mechanism for said sleeve, shifting gearmechanism for eifecting engagement and disengagement between the rackand pinion mechanismlost motion gearing between the actuating lever keyof the machine and the rack and pinion mechanism, clutch mechanismdependent on the motion of the typewriter carriage for connecting anddisconnecting the transmission shaft of the rack actuating gearing,locking and unlocking mechanism for the actuating key segmental gears,together with the several features of improvement and construction asmore fully hereinafter set forth and claimed.

In the drawings illustrating the invention, Figure 1 is a 'view of thetypewriting machine provided with myimprovement, in front elevation.Fig. 2 is a plan view of a portion of the machine, showing theattachment. Fig. 3 is an enlarged sectional view, showing indicatingdisks and the operating Fig.4 is a vertical sectional view through theindicating disks,.illustrating the arrangement of the longitudinaladjustable positioning shaft for the actuating master pinion, thesection being taken on the line IV. of Fig. 5. Fig. 4 is a detail viewshowing the spring retracted gear shafts. Fig. 5 is a cross sectionalview taken on the line V. V. of Fig. 3. Fig. 6 is a plan view in detail,showing a portion of the actuating mechanism by which movement isimparted to the rack bar operative mechanism. Fig. 7 is a detail view inelevation, illustrating the clutch mechanism, etc. Fig. 8 is a crosssectional view taken on the line VIII. VIII. of Fig. 3. Fig. 9 is adetail'cross sectional view, showing two of the co-acting pinions. Fig.10 is a detail view, showing the arresting device. Fig. 11 isa-perspective detail view showing the actuating arm for the rack barmounted on the marginal stop of the scale controlling the operation ofthe master pinion for either addition or subtraction. Fig.

15 is a perspective detail view, showing the clutch operating levermechanism. Fig. 16

is adetail view showing the cam controlling locking mechanism for thesegmental gears and the rack shaft. Fig. 17 is a similar view showingone of the rack bars and its actuating gear. Fig. 18 is a similar viewshowing one of the key-actuated gears depressed and the relativeposition of its coacting gear, in lost motion position. Fig.

19 is a detail view showing a duplicate cam' actuating arm.

The indicating mechanism for giving the results, either in addition orsubtraction. comprises a group of indicating or totaling wheels a and 6arranged at each side of the central portion of the machine within asurrounding partly cylindrical casing 2, having a corresponding seriesof sight apertures 3 for exposing the particular numeral of each wheela, or b t-o-view, as it is actuated in connection with .the operatingmechanism, the several wheels of each series being revolubly mountedwithin intervening stationary housing rings 4, fixedly locatedand'connected with the casing by any suitable. items, as rods 5 (Figs. 3and 4).

It will be understood that either group or series of wheels (1. or b isindependent of the other, and is. operative independently or alone, byits particular actuating rack, hereinafter described, dependent onindividual clutch mechanism, which is controlled by selective adjustablecam actuating devices chine.

and Z), corresponding to the decimal pointposition, and unprovided withindicating.

carried by the scale bar or a marginal stop thereon, and adapted tocooperate with the Ordinary set of type bars of a standard ma-Inoperative or dead wheels anumerals, comprise an idler. element of eachseries. Each of said wheels (1 and -b is provided with a laterallyofi'-set portion 6 providing annular space for interposing a projectingtooth 7 or teeth, in the case of the unit wheel, adapted/to actuate theparticular one of a corresponding series of toothed idler wheels 8,loosely mounted on shaft 9, and adapted to intermittently transmitmovement from one wheel to the other to ac complish accumulation oftheadding or subtractin process, in the well-known manner of mec anism ofthis type and which wtll be readily understood without further description, it being understood that the num ber ofthe wheels, 'thearrangement of the indicating numerals, etc., is such as to effectthemaximum capacity of the invention within any desired limits. In theconstruction illustrated, the machine has a capacity to the extent of9,999,999.99. Each of the wheels a and I) is provided with an innerperipheral series of pinion teeth 10, registering longitudinallythroughout the entire series, the endmost indicating wheels abuttingagainst stationary terminal, non-acting wheels 11, 11, ateach end, saidwheels being located within and against the endmost walls 12, 12,forming portions of the framework and easing.

For the purpose of actuating the wheels a and bone at a time, I providea longitudinally adjustable master pinion 13 which is mounted uponarotatable sleeve 14 having transverse slots 15, 15, through eachopposite side, with which sleeve the-master pinion 13 is rotatablyconnected by means of a transverse pin. 16, said pin extending alsoterminal 17 is connected with the shifting shaft 18,.at each end bymeans of a" ball joint 21, 'so constructed as to permit of free turningof the terminal 17 independent of the shaft and to provide forlongitudinal movement of the terminal and master wheel- 13 in eitherdirection, by said shaft. The slotted sleeve 14 is rotatably mounted ateach end in the casing frame 12, as shown, and each'sleeve is providedat its inner end with an actuating pinion 22, secured upon the sleeve inany suitable-manner, as bya key 23. Thus, each sleeve and itslongitudinally adjustable master wheel when located in register with theparticular indicatin wheel which corresponds with the particu arnumerical column being printed on the typewriter, is designed to beactuated through itspinion 22 and the rack and gearing which are throwninto operativeengagement by its particular clutch mechanism undercontrol of the particular actuating arm and cam employed, mounted on themarginal stop and scale bar. v

For the purpose of rotating sleeve 14 and master pinion 13 in onedirection or the other, as desired, the mechanism illustrated in thedrawings, and articula'rly in Figs. 12, 13 and 14, is providied, wherebyto actuate the sleeve 14 to the desired extent, as suming the masterwheel in engagement with one of the several indicating wheels a or 2),dependent upon the carriage control shifting mechanism, hereinafterdescribed, and which transmits its motion through pinion 19 to shiftingshaft 18. Each pinion 22- is designed to be rotated in one direction or90 the other through either intermeshin pinion 24 or 25 carried on astud 26 exten ing inwardly from a rocking bracket'arm 27 which ispivotally hung around the outer end portion of each sleeve 14, asindicated at 27 (Fig. 4) between the casing wall 12 and pinion 22, ateach side of the center of the machine, one such bracket with itspinions being provided for each pinion 22. Each of. the pinions 24 and25 is provided with a companion pinion 24and 25 respectively, alsorotatably mounted on studs 26 and normally pressed into holdingengagement with its companion pinion 24 and 25 respectively by a coiledspring 28. The inner contacting g faces of companion pinions 24-24 and2525 are provided with series of ratchet teeth 29, operable tointerengage and impart motion from one companion pinion to the other inone direction, but allowing pin-' ion 24 or 25 to rotate in reverseddirection without imparting movement to its companion pinion 24 or 25,by riding over the wheels and being pressed backwardly thereby,compressing springs 28.-

For the purpose of positively"actuating either pair of wheels 24 24or.-25.25 upon downward motion of the particular key lever C of themachine whichoperates to print the particular. numeral appropriate 12bfor the particular operatiom as in the ordinary functioning of thetypewriter'itself,-

I provide the double sided rack bar 30'which is vertically and slidablymounted in a supporting guide or bracket 31, extending outwardly fromthe inner' face of easing '2, which rack bar is bifurcated'at'filithupper, end, as sliown,'providing the terminial members 82,- 33, each'ofwhich is provided across its outer'edge with a series of rack, teeth 34,

35, adapted to intermesh with the teeth of pinion 24' or 25, dependingupon which pinion is thrown into mesh, for imparting rotation to sleeve14 in the desired direction (Figs. 5, 12, 13, and 14). For the purposeof properly bringing one pinion or the other, 24 or 25, into operativemeshing engagement with rack teeth 34 or 35, dependent upon whetheraddition or subtraction is being performed; or for throwing each pinion24 and 25 at the same time out of engagement with either set of rackteeth 34 or 35 for inoperation, the bracket 27 is provided with acentral depending lug extension 36 which is engaged by the clevisterminal 37 of a controlling lever 38 pivoted on supporting shaft orstud 39, extending downwardly through a slot 40 in the front casing 52and provided with a finger terminal 41. This device is adapted to be setin either the upper position (Fig. 5) for addition, or in the lowerposition (Fig. 14) for subtraction, or in the intermediate position(Fig. 13) for inoperative positioning of the pinions 24 and 25. As shownin Fig. 1, these three positions are indicated bv the denominatingletters A, D and S. Vhen lever 38 is thrown to the raised position, asin Figs. 5

" from engagement with rack teeth 34 and and 12, the terminal 36 ofbracket 27 is thr wn inwardly, throwing pinion 24 away teeth.34 and andwhen the lever 38 is thrown into the lowered position (Fig. 14),

pinion 24 is brought into interme'shing engagement with rack teeth 34,and pinion 25 is still maintained out of engagement with teeth 35. If,therefore, the rack bar 30 is lowered when pinion 25 engages rack teeth35, as in Figs. 5 and 12,"pinions 25' and 25 will be rotated in thedirection of the arrow, and will impart motion to pinion 22 in thedirection of its arrow, rotating the sleeve 14 and master pinion 13 toan extent dependent upon the downward travel of rack bar 30. It is,therefore, desirable that the rack bar shall be actuated onlysufliciently far, for each key lever manipulation, to rotate the masterwheel 13 to an extent corresponding to the movement necessary to bringthe proper numeral into view, in conformity with the standard uniformprinting action of the type bar and type, the movement of all of whichis the same.

, For the purpose of actuating the rack bar 30, it is provided with aseries of rack teeth 42 in meshing engagement wit-h a segmental pinion43, which is loosely mounted by its ub upon shaft 44 extending acrossthe lower portion of the casing and adapted to be intermittentlypartially rotated for each operation, when the computator mechanism Forthe purpose of actuating shaft 44 only sufliciently, more or less, toeffect the desired downward movement to rack bar 30, each particularoperating key lever O is provided with a connecting rod 45 which-in turnis connected with a segmental pinion 46 adapted to actuate a coactingmutilated pinion wheel 47 secured on shaft 44, (Fig. 8) a pair of wheels46-47 being provided for each particular lever, there being ten in allof such, as shown, five at one side and five at the other, correspondingin number to the decimal number of the numerals comprising the completeset ordinarily used, the wheel 4'7 being omitted for the zero key. Eachparticular segmental gear 46 and 47 is mounted upon its pivoting shaft48 and 44 respectively and is provided with a hub 49 having a clearanceslot 50 for lost motion engagement with a pin 51 extending out wardlyfrom shaft 48, whereby any particular segmental gear 46 or 47, whenlowered, will partially rotate shafts 48 and 44, butwithout impartingmovement to any other ofthe segmental gears 46 or 47. Shafts 48 and 44are normally retracted by any suitable spring device, as springs 48,44", engag-" ing arms48 44, secured to the shafts, as in Fig. 4 or byother suitable means.

The purpose of the. lost motion mounting of gears 4647 on shafts 4844 isto primarily effect movement of the particular gear 46 acted upon, andits companion gear 47, and to at the same time actuate shaft 48 toeffect locking of all of the other gears 46 and their connected parts,by means of a latch 52 adapted to be lowered into a suitable lockingnotch 53 in the upper edge portion of each gear 46, as shown (Fig. 16.)For the purpose of lowering the latches 52 downward into said notches, acam 54 is mounted on shaft 48 and actuatesa bell crank lever 55- pivotedat 56, the other end of the lever engaging underneath one of the latches52 by a pin or lip 57 thereon, thereby throwing all of the latchesupwardly on their pivoted mounting stem 58 when the cam 54 isinoperative, and allowing the latches to fall into notches 53 when thelever is thrown down by the cam. The cam 54 is so constructed as tomaintain bell crank lever 55 in thrust out positionuntil the end ofthe-operation, locking all of the gears 46 by the latches 5 2, nothatonly the particular gear being used is free to move. It will beunderstood that at the commencement of v the operation, the actuatedgear 46 moves past the point of latch .52 slightly before cam 54actuates the lever to allow the latches to make locking engagement withthe re- 5 maining gears. At the same time that cam 54 operates lever 55,a locking bar 59 pivoted at 60 is thrust downwardly between the teeth ofrack shaft 18 by a connecting rod 61, positively holding the rack shaft.in

locked position during. the printing operation, and preventing itsmovement until the. termination thereof.

It will be observed that the teeth of each particular gear 46' and 47are limited in number to the desired extent of movement' of'gear 47, andthese gears are so constructed as to prevent further movement of gear 47during the continued further movement of gear 46 to the full extent ofthe uniform limit of the stroke of each particular-key 25. the astoperative tooth, as indicated at 62,

. conforming to the outer radius of ear 46,

wherebysaid gear will slide past t 1e gear '47 without affecting it onfurther downward ..movement, an'dwillengage its teeth on the reversemovement'to reestablish the-normal position (Figs 8 and 18). Thedpositioning of the master wheel l3 longitu 'nall'y and with relation tothe particular indicating wheel a or bto be'actuated depends pri- -3'5marily on the travel of the carriage within .a certain predetermineddistance, during which it is desired to print the number, as in'a columnof figures. Adjustably mount- .ed .on the scale bar of the carriage, oron 40 any other convenient portion thereof, is a suitablemovablesupport, as the marginal stop 64 adapted to be set-in anydesire'd'position longitudinally of the scale bar, as will be readilyunderstood, and with the usual indicating pointer 6 5 for locating itwith relation to the indicating pointer 65 for locatingitflwith'relation to the indicating scale of the bar.

.-.: i-gina'l stop 64.is provided with D dovetailed recess 66 betweenits endmost portions, into which recess is set the upper end ofactuating arm. 67 .which extends downwardly inYfront-of the track bar tbe V hind-the ca ingd the computing mechanism 5--above described. Thearm 67 is provided g-with a terminal':68 adapted-to engage theshouldered terminal 69 0f a latch 70 which is ivotally-mounted inshifting rack bar 71. saldbaris slidably mounted in the rear up- 60 perportion of the case 2 and is provided with a series of rack teeth-7 2along its underside in engagement with a pinion 73 mounted on theinnerend of shaft 20 connected withza retractingfspring 75 at its \otherend" 6 (Fig. 11) The shaft 2 0 extends through ZLABLE Cop thefront ofthe case and is provided with an ind cating hand 76 operable to indicatethe position of shaft-20 and the corresponding position of the masterpinion 13, on a dial 77 (Ijig.v 1). Another purpose of this feature isthat by inserting a pin in any particular one of the holes 77 of thedial, providing an abutment for hand 76, its movement will be arrestedand the limit of travel 7 ofshaft 18 also controlled so as to check themaster pinion 13 at any desired point, for using the limited capacityonly of the machine. The shaft 20 is also provided with a pinion 78engaging a rack bar 7 9 mounted on' a suitable slideway support in thefront portion of the casing, as shown, and provided with a pointer 7 9"extending through slot 7 9 and adapted to indicate the particularnumeral corresponding to the wheel tier .7). with which the masterpinion is in gear (Fig. 1). Mounted upon the middle portion of shaft 20is the pinion l9 meshing into rack shaft l8-and adapted to shift it andthe 'master wheels 13 in conformity with the extent of movement of thepinion 73, or controlled motion of shaft 20, under action of the slidingrack bar 71.

The forward end 69 of shouldered latch bar 70 is provided with a taperedor inclined nose, as shown, adapted to engage a" pin abutment 80 as thetravel of-the carriage brings the latch bar to such point, where it isdesired to disengage the actuating arm 67 therefrom to terminatemovement of bar 71, abutment 80thrusting latch 70 backwardly against a.pressure spring 81, permitting the actuating arm 67 to travel along withthe scale bar and marginal stop to the end of its movement. edge of theactuating arm 67 will ride over the latch end 69, depressing spring 81and sliding by'to the initial position, when it is ready for the nextoperation. .The actuating arm .67 is designed, at thetime it eiiectsoperation of pinion 73 and shaft Q0 and its connected parts, to at thesame time effect clutch engagement between shaft 44 and the hub of oneof the rack actuating segmental pinions 43, or between shaft 44 and thehub of each of said pinions, depending on whether one" or both series ofindicating wheels-are beingused. For such purpose a clutch 82 is splinedon shaft 44, one of such clutches being positioned at each side of thecenter and designed to transmit movement from shaft 44.through se mentalpinion 46,

depending. on which of said p1n1o ns 1s" clutched, and corresponding tothe printing of: one or more-columns, whereby to operate .oneor theother of racks 30, depend1ng on" the setting oflever 38 for eitheraddition or subtraction.

' For the purpose of actuatingclutch' 82, I." provide a clutch engagingclev s 83 atthe lower end of a lever arm 84 pivoted at 85 loo On-theback travel, the other BEST AVAILABL c to the inner side of the frontwall of the easing, adapting it to swing in one direction or the otherunder the control of a bell crank lever 86. Said lever is pivoted at 87on a supporting cross bar 88, its long arm being connected with lever 8%at 88, and its short arm being connected at 89 with a connecting bar orlink 90 which is connected at its other end at 91 with the lower end ofthe primary actuating lever 92. Said lever is pivotally mounted on a.rock shaft 93 supported within the casing and extends upwardlytherea'bove and is provided with an inwardly projecting terminal 94adapted to be engaged by a cam 95 extending outwardly from the face ofthe lower portion of actuating arm 67 and having bevel ends or inclinedterminals at each extremity, facilitating the engagement of said camwith the lever (Fig. 15). As actuating arm 67 is carried along by themarginal stop 64, as above described, cam 95 engages the end 94 of lever92 and effects shifting operation of the lever mechanism and resultingclutch engagement of clutch 82 with the clutch hub'of segmental pinion43. Thereupon operation of any one of the several key levers C willimpart downward movement to the particular rack bar 30- which it isdesigned to'operate. When desired, both clutches 82 may be thrown intogear by the use of both levers 92 by the use of an actuating arm 67havingtwocam's 95 and 95 (Fig. 19), one of the levers 92 l1aving itsupper terminal 94 deflected over the top of the other so as to engagesaid cam 95 at the same time as the other. It is also obvious that byuse of an actuating arm and a properly located cam, either lever 92 may'be individually actuated.

In order to prevent partial operation of any oneof the segmental gears46 and reaction thereof, should the key lever not be depressed to itslimit, and in order to insure against reverse movement of shaft48 ineither direction. until its full travel has been accomplished, shaft 48is provided with an arm 96 extending. radially therefrom and providedwith a centrally arranged finger 97, norm-ally held within a receivingslot in arm 96 in central position by means of a. spring 98 at eachside, whereby to permit of lateral movement'of finger 97 in eitherdirecspring over to central position again and on the reverse movementwill ride along the ratchet teeth on the opposite face, interlockingwith them in the same manner, until arm 96 has been retracted to itsinitial position (Fig. 10). As shown in Fig. 3, segment 99 is ofsuiiicient inclination to the plane of movement of arm 96 as to deflectits extremities to one side and the other of such plane, so as tofacilitate the operation and engagement of finger 97 and insure itslocking coaction with the ratchet teeth. In riding along one side of theteeth downwardly, finger 97 will be gradually pressed back by theinclined arrangement of the contacting ratchet teeth. against pressureof spring 98 on one side, the same operation, in a reversed direction,being accomplished along the other side of the ratchet teeth.

The construction and operation of the invention will be understood fromthe foregoing description. The computing mechanism is applicable to anyof the standard makes of typewriters and provides for the variouscomputationsordinarily carried outin the use of typewriters in billing,writing statements, reports, etc., requiring additions orsubtractions,or those computations usually provided for in special so called addingmachines. It is distinctive in providing the right. hand and left handtotaler, each adapted to give its particular results, and serves as acheck on the operation and results at all times. Thus, to illustrate: inthe writing of remittance letters by banks, bank statement accounts,bank deposit sheets or voucher writing, the left hand totaler can beused to show the bank balance andthe righthand totaler used for thepurpose of adding the amounts of checks issued. By throwing the' lefthandtotaler to operate in subtraction and the right hand in addition,the right hand totaler will give the total amount of the checks added,successively, indicating each additional amount, while the left handtotaler will deduct the amount of each check from the balance.

In using the machine for daily charge billing in mercantiletransactions, it can be used for writing and addingitems charged in onetotaler, while the other will carry the amount of items charged .duringthe day. The machine can also be used for condensed charge billing, unitbilling, and all systems of billing where a footing or checking of billsis done, also for listing of checks, and isadapt'able for use on atypewriting machine for the purpose of addition or subtraction whereverany statement work of any description may be written on a'typewriter.

What I claim is:

1. In computing mechanism of the class described, aseries of indicatingwheels having external indicating numerals and provided with internalteeth, exterior 1nteren-' gaging transmitting wheels, a longitudinally,

movable master pinion adapted to engage ion through the slotted sleeve.

A aging transmittin said indicating wheels individually, a slottedsleeve extendi through the master pinion, means for rotating the slottedsleeve, a rack toothed thrust shaft, and a rotatable terminal' thereonoonnected'with the master 2. In computing mechanism of the classdescribed, a series of indicating wheels 'having external indicatingnumerals and pro vided with internal teeth, exterior interenwheels,alongitudinally ovable master pinion-adapted to engage said indicatingwheels individually, and means for rotating the master wheel and itsengaged indicating wheel embodying arotatable slotted sleeve and athrust shaft having a portion rotatably connected with the master pinionthrough said slotted sleeve.

3. In computing mechanism of theclas's described, a series of indicatingwheels pro vided with internal teeth, exterior interengagingtransmitting wheels,

, with a terminal actuat ng gear.

. '5. The combination with a series of internally toothedindicatingwheels and in tervening motion-transmitting .mechanism therefor, of alongitudinally adjustable interior master pinion, athrust shafttherefor, a surrounding slotted sleeve rotatably engaging the masterpinion and provided witha terminal actuating gear, and mechanismoperable to actuate said terminal pinion in:

either direction.

6. The combination with a series of indicating wheels provided withintervening motion-transmitting gears, of a longitudinally adjustablemaster wheel provided with rotating mechanism, a double-sided rack bar,means for actuating the rack bar, and adjustable mechanismfor'transmitting movement from oneside of said rack bar to the masterpinion rotating mechanism, substantially as set forth.

7. The combination with a series of indicating wheels provided-withintervening motion-transmitting gears, of a longitudinally adjustablemaster wheel provided with rotating mechanism, a'doub e-sided rack bar,means for actuating the rac Y bar, adjustable mechanism for transmittingovement from one side of said rack bar to th gmaster inion rotatingmechanism, and mec anism or ada longitudinally movable master pinionadapted' to engagerack bar a bar,

A ting mechanism;;from the rack shaft to said parts, substantially asset forth.

8. The combination with a series of indij usting the transmit eatingwheels, master wheel, sleeve and its pinion; of a tilting compositeratchet --toothed spring pressed,

frame provided with means for actuating'the thrust bar in conformitywith the carriage travel of the typewriter, a vertically movable rackbar and mechanism adaptin it to transmit rotatable movement to the sleeve and master pinion,

and means connected with the operating type levers of the typewriter fortransmitting movement to the vertically movable rack bar,substantially-asset" forth. 10. The combination with a series of in--dica ting'-.wheels, master wheel, sleeveand its pinion; of atilting'frame provided with composite; ratchet-toothed spring-pressedpinions, a vertically movable double-sided operable toengage one or theother pinions, a gear engaging the rack and mechanism connected with the'key of said bar,

levers of. a typewriter .for'actuating said gear, substantially vas setforth. he combination with a'series' of ind ieating wheels, masterwheel, sleeve and its pinion;- of atilting frame provided withl,

composite ratchet toothed spring pressed pinions, a vertically movabledouble-sided rack bar operable to engage one ortheother of said pinions,

bar, andmechamsm embodying lostmotion devices connected with the key.leversof a typewriter for actuating said gear, substantially assetforth. 1

12. The combination with aseries of indicating wheels, master wheel,sleeve and its pinion,- of a tilting frame provided with compositeratchet-toothed spring-pressed pinions, a-vertically movabledouble-sided rack bar operable'to engage one or the other ofsaidpinions, a gear engaging the rack and mechanism comprising a pluralityof gears connected with the key levers of a typewriter and embodyinglocking devices for the inoperative gears, for actuating said gear,substantially as set forth. 5

13. The combination with a series of indicating wheels, master wheel,sleeve and its pinion; of a tilt" g frame provided with compositeratchet toothed springpressed pinions, a vertically movabledouble-sidedraclrbar, a shaft having a gear engaging the rack bar and provided witha plurality of separately operative gears and. clutch mechf 7 a gearengaging the. ra k BEST AVAILABLE COP:

anism, and means for actuating said sepa rately operative gears,substantially as set forth.

14, The combination with a series of indicating wheels, 1naster wheel,sleeve and its pinion; of a tilting frame provided with compositeratchet toothed spring pressed pinions, a vertically movabledouble-sided rack bar, a shaft having a gear engaging the rack bar andprovided with a plurality of separately operative gears, clutch mechanism and means for actuating said sepazitely operative gears,substantially as set forth.

- 15. The combination with the indicating mechanism and theniasterwheel, sleeve, its pinion, rack shaft, and shifting gear there for; ofmechanism for reversibly actuating the master wheel embodying avertically movable double-sided rack and a tilting frame pivoted on thesleeve andprovided at each side with a two-part ratchet pinioncooperable with the sleeve pinion and the rack, substantially as setfort-h.-

"16. The combination with the indicating mechanism and the master wheel,sleeve, its pinion, rack shaft, and' shifting gear therefor; ofmechanism for reversibly actuating the master wheelembodying a,vertically movable double-sided rack and a tilting frame pivoted on thesleeve and provided at each sidewith a two-part ratchet pinioncoiip'erabie -iviththe sleeve pinion and the rack, and spring mechanismmaintaining the two-part ratchet pinions in engagement and permittingreversal of'one member thereofby the rack without imparting motion tothe other,-'substa1itially as set forth.

17. The combination with the indicating mechanism and the master wheel,sleeve, its

pinion, rack shaft, 'and shifting gear therefor; of mechanism forreversibly actuating the master wheel embodying a vertically movabledouble-sided rack and a tilting frame pivotedon the sleeve andprovidedateach side with a two-part ratchet pinion cooperable with the sleevepinion and the rack and provided with'mean's for shifting thetiltingframe, substantially as set forth.

18. The.combination with the indicating mechanism and-the master wheel,sleeve, its pinion, rack shaft, and shifting gear therefor; of mechanismfor reversibly actuating the master wheel embodying a vertically movabledouble-sided rack and a tilting frame pivoted on the sleeve and providedat each. side with a two-part ratchetpinion cooperable with the sleevepinion and the rack and provided with a lever for shifting the tiltingframe, substantially as set forth.

19. The .combination with'the indicating mechanism and the master wheel,sleeve, its pinion, rack shaft, and shifting gear therefor; of mechanismfor reversibly actuating the master wheel embodying a vertically movabledouble-sided rack and a tilting frame pivoted on the sleeve and providedat each side with a two-part ratchet pinion c0- operable with the sleevepinion and the rack and provided with a lever for shifting the. tiltingframe, said lever having.a slotted itniczlilting covering plate,substantially as set 'ort 20. The combination with the actuating rackfor the master wheel actuating mechanism, of a shaft having a gear enrack and provided with a plurality of lost motion pinions, a shafthaving a corresponding series of loosely mounted coacting gears havinglost motion engagement with the shaft, and means for actuating each ofsaid gears separatel substantially as set forth.

agin the 21. The combination with the actuating rack for the masterwheel actuating mechanism, of a shaft having a gear engaging the rickand provided with a plurality of ears having progressively numbered teeta. shaft iaving a series of loosely mounted co acting gears having lostmotion engagement with the shaft, and means for actuating each of saidgears separately, substantially hs st iug each of said gears separately,substantially as set forth.

23. The combination with the actuating rack for the master wheelactuating mechanism, of a shaft having a gear engaging the rack andprovided with a plurality of gea rs having progressively numbered teeth,

a shaft. having a series of loosely mounted co-acting gears having a pinand slot engagement with the shaft, means for locking the other gears ofthe shaft, and means for actuating each of said gears separately,substantially as set forth.

24. Means for actuating the master wheel controlling rack consisting ina shaft having a gear engaging-the rack and provided with a plurality ofmutilated'gears mounted on said shaft for lost motion, a shaft providedwith a corresponding series of driving gears, and means for actuatingthe driving gears singly, said gears having portions providing for lostmotion of the driving gears, substantially as set forth.

25. Means for actuating the master wheel controlling rack consisting ina shaft having agear engaging the rack and provided with a plurality ofmutilated gears mounted on said shaft for lost motion, a shaft providedwith a corresponding series of driving gears BEST AVAILABLE COP.

mounted thereon to admit of movement of one gear independent of theothers, individual actuatin means for each gear, and means for lociing'the emaining gears against movement, substantially as set forth.

' 26. Means for actuating the master wheel controlling rack-consistingin a shaft hav- 1 ing a gear engaging the rack and provided drivingengage the gear abutme'nts, andlever mech-- with a plurality ofmutilated 'gears, a shaft 10 rovided with: .a. corresponding series ofdriving gears having locking shoulders, in-

dividual-actua-ting mechanism for eachdriving gear, and cam-actuatedpawls adapted to engage the shoulders of the inoperative driving gears,"substantially as set forth.

27. Mechanism for locking a series of cars for the rack actuatingmechanism eac provided. with anabutment, consistingof a supportinshaft,a cam thereon, a serie'sof pawls, an lever mechanism op--erati'vely engaging the stantially as set forth. 28. Mechanism forlocking the rack shaft for the'masterwheel consisting of an interlockingarm, a partly rotatable shaft, a cam thereon, shaft rotating mechanism,and lever cam and pawls, sub- -mechanisn 1.operatively engaging the camand said lnterlocking arm, substantially as set forth.

' 29. Mechanism for locking the rack shaft for the master wheel and thesoi ies'of driving'gears for the rack actuating mechanism each providedwith an abutment, consisting of an interlocking arm for the rack shaft,a supporting shaft for the driving gears, a cam thereon, a seriesofpawls adapted to actuating each gear separately, and means forpreventingreverse movement of the shaft before it has been rotated toits full normal movement, substantially as set forth.

31. The combination with the intermittently operative shaft for thedriving gears, of an arc-shaped inclined ratchet faced arm, and alocking arm secured on the shaft having a spring terminal adapted totraverse the inclined faces of the ratchet faced arm, substantially asset forth. S

32. Locking mechanism for the driving gear shaft consisting of an areshaped ratchet faced arm concentric with the shaft and angularlyarranged across its longitudinal center, and a locking arm secured tothe shaft having-a spring terminal adapted to traverse the faces of theratchet faced arm and to interlock therewith, substantially as setfonth.

'33; The combination with a driving Shaft provided with a'sries ofdriving gears, a driven shaft provided with.a'series of coacting drivengears, a rack actuatin gear,-:

and a clutch; of lever mechanism -,or theclutch, and a movable camadapted to actu'-- ate the lever mechanism andclutch, substantially asset forth.

34. In a typewriter, the combination with computing and indicatingmechanism j emv-'ll$ bodying a series of indicating wheels, amaster.wheel therefor, and mechanism for shifting and rotating the masterwheel embodying a rack bar; of individually operative gearing foractuating the rack bar, clutch mechanism adapted to efi'ectoperative connection thereof, clutch actuating lever-mech-" the carriage of thetypewriter adapted to actuate the clutch actuating lever 'meoha-- nism,substantially as set forth.

,anism, and a cam mounted to travel with 35. In a typewriter, thecombination with two sets of computing and indicating mechanismembodying series of indicating wheels,

each having a master wheel and mechanism for shifting and rotating themaster; wheel embodying a rackbar; of gearing for actu-. ating the rackbars, clutch mechanlsm adapt.- ed to effect operative connection of thegearing toactuate the mechanism foreachmaster wheel, correspondingclutch actuating lever mechanism, and cams mounted 'to travel with thecarriage of the typewriter. adapted to actuate each clutch actuatingle-- ver mechanism, substantially as set forth. 7

.36. In computing'an'd indicating mecha-.

nism for a typewriter, the combinationwith' the master wheel and itsrack shaft, of a transverse shaft having a gear engaging the rack'shaftand a driving pinion, a rack bar engaging the driving pinion and havinga latch, and an arm mounted to travel with the carriage of thetypewriter adapted to engage the latch to shift the rack bar,substantially as set forth.

'37. In computing and indicating mechanism for a typewriter, thecombination with the master wheel and its rack shaft, Offl transverseshaft having a gear engaging the rack shaft and a driving pinion, a rackbar engaging the driving pinion and having a latch, an'arm mounted tocarriage of the typewriter adapted to engage the latch to shift the rackbar, and a stationary abutment adapted to effect disconnection of thelatch from the arm, substantiallyas set forth.

38. In'computing and indicating mechanism for a typewriter, thecombination with the master wheel and its rack shaft, of a transversespring retracted shaft having a. gear engaging the rack shaft and adriving pinion, a rack bar engaging the driving pinion, means actuatedby the carriage of the typewriter adapted to shift the rack bar,

travel with the I EST AVAILABLE COP;

and means indicating the position of the rack shaft actuating shaft,substantially as set forth.

39. In computing and indicating mechanism for a typewriter, thecombination with the master :wheel and its rack shaft, of a transverseshaft having agear engaging the rack shaft, a driving pinion, and anindicator, a rack bar engaging the driving pinion, and means actuated bythe carriage of the typewriter adapted to shift the rack bar,substantially as set forth.

40. ln computing and indicating niecha I nism for a typewriter, thecombination with the master wheel and its rack shaft, of a rack shaft, adriving pinion,.and an indicator, a dial therefor, means limiting thetravel of the indicator on the dial, a rack bar,engaging the drivingpinion, and means actuated by the carriage of the typewriter adapted toshift the rack bar, substantially asset forth.

In testimony whereof I hereunto afiix my signature in the presence oftwo witnesses.

o. M. on; FREDK. swi

flopiel of this patent may be obtained for live cent: each, byaddressing the Commissioner of Patentl,

I Washington, D. 0.

